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| author | Paul E. McKenney <paulmck@kernel.org> | 2020-03-17 04:38:29 +0100 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2020-04-27 20:03:52 +0200 |
| commit | 43766c3eadcf6033c92eb953f88801aebac0f785 (patch) | |
| tree | 3b0c7faa6e1ba5202d9b3f10a076953bea212b20 /kernel/rcu/tree_plugin.h | |
| parent | rcu-tasks: Make rcutorture writer stall output include GP state (diff) | |
| download | linux-43766c3eadcf6033c92eb953f88801aebac0f785.tar.xz linux-43766c3eadcf6033c92eb953f88801aebac0f785.zip | |
rcu-tasks: Make RCU Tasks Trace make use of RCU scheduler hooks
This commit makes the calls to rcu_tasks_qs() detect and report
quiescent states for RCU tasks trace. If the task is in a quiescent
state and if ->trc_reader_checked is not yet set, the task sets its own
->trc_reader_checked. This will cause the grace-period kthread to
remove it from the holdout list if it still remains there.
[ paulmck: Fix conditional compilation per kbuild test robot feedback. ]
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'kernel/rcu/tree_plugin.h')
| -rw-r--r-- | kernel/rcu/tree_plugin.h | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h index 4f34c325dd90..37e02812d18f 100644 --- a/kernel/rcu/tree_plugin.h +++ b/kernel/rcu/tree_plugin.h @@ -331,8 +331,7 @@ void rcu_note_context_switch(bool preempt) rcu_qs(); if (rdp->exp_deferred_qs) rcu_report_exp_rdp(rdp); - if (!preempt) - rcu_tasks_qs(current); + rcu_tasks_qs(current, preempt); trace_rcu_utilization(TPS("End context switch")); } EXPORT_SYMBOL_GPL(rcu_note_context_switch); @@ -841,8 +840,7 @@ void rcu_note_context_switch(bool preempt) this_cpu_write(rcu_data.rcu_urgent_qs, false); if (unlikely(raw_cpu_read(rcu_data.rcu_need_heavy_qs))) rcu_momentary_dyntick_idle(); - if (!preempt) - rcu_tasks_qs(current); + rcu_tasks_qs(current, preempt); out: trace_rcu_utilization(TPS("End context switch")); } |